syzkaller login: [ 32.737678] BUG: Bad rss-counter state mm:00000000c2e155c1 type:MM_FILEPAGES val:33 [ 32.738973] BUG: Bad rss-counter state mm:00000000c2e155c1 type:MM_ANONPAGES val:22 [ 32.893599] ================================================================== [ 32.894546] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.895506] Read of size 8 at addr ffff888010307df0 by task sshd/220 [ 32.896283] [ 32.896506] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.897533] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.898526] Call Trace: [ 32.898859] [ 32.899148] dump_stack_lvl+0x91/0xf0 [ 32.899650] print_report+0xcc/0x620 [ 32.900147] ? __virt_addr_valid+0x102/0x340 [ 32.900720] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.901369] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.902000] kasan_report+0xbe/0xf0 [ 32.902480] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.903110] vma_interval_tree_remove+0xc75/0xec0 [ 32.903718] vma_prepare+0xc54/0x11a0 [ 32.904204] __split_vma+0x5af/0x950 [ 32.904678] ? __pfx___split_vma+0x10/0x10 [ 32.905215] ? find_held_lock+0x2c/0x110 [ 32.905740] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.906318] ? lock_is_held_type+0x9f/0x120 [ 32.906868] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.907503] ? mtree_range_walk+0x632/0x900 [ 32.908055] ? mas_walk+0x5c7/0x7c0 [ 32.908541] do_vmi_munmap+0x1f1/0x2b0 [ 32.909035] mmap_region+0x1f9/0x2660 [ 32.909552] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.910076] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.910842] ? __pfx_lock_acquire+0x10/0x10 [ 32.911399] ? __pfx_mmap_region+0x10/0x10 [ 32.911955] ? security_mmap_addr+0x7d/0xa0 [ 32.912521] ? get_unmapped_area+0x1f5/0x3f0 [ 32.913104] do_mmap+0x854/0xf00 [ 32.913571] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.914079] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.914654] ksys_mmap_pgoff+0x3af/0x500 [ 32.915205] do_syscall_64+0x3f/0x90 [ 32.915693] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.916345] RIP: 0033:0x7f7fe7b79d82 [ 32.916805] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 32.918962] RSP: 002b:00007fffe07f2d78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.919873] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7fe7b79d82 [ 32.920725] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7fe6fb3000 [ 32.921605] RBP: 00007f7fe6fb3000 R08: 0000000000000009 R09: 0000000000001000 [ 32.922452] R10: 0000000000000812 R11: 0000000000000206 R12: 00005599c3a95ec0 [ 32.923304] R13: 00007fffe07f2d90 R14: 00007fffe07f2dc0 R15: 00007fffe07f3120 [ 32.924177] [ 32.924474] [ 32.924694] Allocated by task 213: [ 32.925144] kasan_save_stack+0x22/0x50 [ 32.925657] kasan_set_track+0x25/0x30 [ 32.926156] __kasan_slab_alloc+0x59/0x70 [ 32.926687] kmem_cache_alloc+0x16b/0x370 [ 32.927210] vm_area_dup+0x20/0x160 [ 32.927674] __split_vma+0x170/0x950 [ 32.928141] split_vma+0xc6/0x110 [ 32.928590] mprotect_fixup+0x8d2/0xb30 [ 32.929111] do_mprotect_pkey+0x87e/0xd40 [ 32.929646] __x64_sys_mprotect+0x78/0xc0 [ 32.930170] do_syscall_64+0x3f/0x90 [ 32.930654] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.931295] [ 32.931510] Freed by task 213: [ 32.931905] kasan_save_stack+0x22/0x50 [ 32.932413] kasan_set_track+0x25/0x30 [ 32.932917] kasan_save_free_info+0x2b/0x50 [ 32.933472] __kasan_slab_free+0x10a/0x190 [ 32.934016] kmem_cache_free+0x10d/0x4d0 [ 32.934538] rcu_core+0x8c8/0x2860 [ 32.934992] __do_softirq+0x1b7/0x7d4 [ 32.935480] [ 32.935695] Last potentially related work creation: [ 32.936287] kasan_save_stack+0x22/0x50 [ 32.936800] __kasan_record_aux_stack+0x8e/0xa0 [ 32.937438] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.938123] remove_vma+0x139/0x170 [ 32.938605] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.939181] do_vmi_munmap+0x1f1/0x2b0 [ 32.939703] __vm_munmap+0x138/0x3a0 [ 32.940186] __x64_sys_munmap+0x59/0x80 [ 32.940692] do_syscall_64+0x3f/0x90 [ 32.941179] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.941833] [ 32.942055] The buggy address belongs to the object at ffff888010307d98 [ 32.942055] which belongs to the cache vm_area_struct of size 168 [ 32.943563] The buggy address is located 88 bytes inside of [ 32.943563] freed 168-byte region [ffff888010307d98, ffff888010307e40) [ 32.944982] [ 32.945220] The buggy address belongs to the physical page: [ 32.945892] page:000000009bbac071 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10307 [ 32.946997] memcg:ffff888013f0b201 [ 32.947430] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.948088] page_type: 0xffffffff() [ 32.948553] raw: 0100000000000200 ffff88800879fc80 ffffea000040b380 dead000000000008 [ 32.949530] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013f0b201 [ 32.950439] page dumped because: kasan: bad access detected [ 32.951105] [ 32.951324] Memory state around the buggy address: [ 32.951904] ffff888010307c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.952777] ffff888010307d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.953674] >ffff888010307d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.954575] ^ [ 32.955395] ffff888010307e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.956274] ffff888010307e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.957147] ================================================================== [ 32.958207] Disabling lock debugging due to kernel taint [ 34.907349] BUG: Bad rss-counter state mm:000000006f6c680f type:MM_FILEPAGES val:33 [ 34.908605] BUG: Bad rss-counter state mm:000000006f6c680f type:MM_ANONPAGES val:22 [ 35.486462] BUG: Bad rss-counter state mm:0000000031204ab2 type:MM_FILEPAGES val:33 [ 35.487624] BUG: Bad rss-counter state mm:0000000031204ab2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21084' (ECDSA) to the list of known hosts. 2023/06/19 14:03:41 fuzzer started 2023/06/19 14:03:42 dialing manager at localhost:44161 2023/06/19 14:03:42 checking machine... 2023/06/19 14:03:42 checking revisions... [ 36.128707] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:03:42 testing simple program... [ 36.176903] cgroup: Unknown subsys name 'net' [ 36.215765] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:03:40 Registers: info registers vcpu 0 RAX=ffffffff86096757 RBX=0000000000000002 RCX=ffffffff86096756 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09ad0 RSP=ffff88806ce099b8 R8 =ffffffff8609675a R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff88806ce09ad8 R13=ffff88806ce09ac0 R14=ffff88806ce09a28 R15=ffff88806ce09a78 RIP=ffffffff81130b8f RFL=00000297 [--S-APC] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffca35c5a58 CR3=0000000005482000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=00007f4d0ebac510000055c60181b790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=ffff8880147676c0 RDX=0000000000000000 RSI=ffffffff813ad6d0 RDI=ffff8880147676f4 RBP=0000000000000000 RSP=ffff888014767610 R8 =0000000000000001 R9 =ffff888014767660 R10=0000000000038001 R11=0000000000003c0d R12=ffff8880147676e8 R13=0000000000000000 R14=ffff888016ae0000 R15=ffff88800cb1b260 RIP=ffffffff813ad521 RFL=00000282 [--S----] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4f1b9a1900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f4f1ade5540 CR3=000000000cace000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=a4541bd368b09d0600000000000ae988 XMM05=1477105a3b430f3f0000000000136220 XMM06=4027208fad42d5db0000000000134fd0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000